Dual E5 Sandy Bridge unable to boot with hyperthreading enabled

[fearandleb]

Hi,

 

I have troubles getting my setup to work with hyperthreading 32 threads. I run a Supermicro X9Dai Rig, 32GB Ram, Dual E5-2670 C0 (CPUID: 0x206d5). I run Yosemite 10.10.1

 

Bootloader is Clover UEFI. Everything runs like a breeze, but I am not able to enable Hyperthreading.

 

With Chimera I got Kernelpanic on Boot with mp_cpus_call_wait Error.

 

Now with Clover and AppleIntelCPUPowermanagement.kext installed (FixHPET=off/on and FORCEHPET=off) I got "panic(cpu 0 caller 0xffffff7f82018cc9) : No HPETs available...CPU(s) configured incorrectly"

Kernel Extension in backtrace: com.apple.driver.AppleIntelCPUPowerManagement

 

After that I tried to remove AppleIntelCPUPowerManagement.kext and AppleIntelCPUPowerManagementClient.kext. It hangs then at "Mac Framework successfully initialized using 16384 buffer headers and 10240 cluster IO buffer headers".

 

Also sometimes it hangs at FakeSMCKeystore: started.

 

I boot with arch=x86_64 dart=0 npci=0x3000 kext-dev-mode=1 slide=0

 

So far no success. I also tried to change ACPI Status from S3 to S1 or disable. No success.

 

May anyone has a clue and could point me in a direction?

 

There was no Problem with Mavericks btw.

 

Thanks a lot,

 

Michael

[fearandleb]

Bump. Anyone? 

 

I had a patched Kernel in Place but this was a 10.10.1 Kernel. Anyone know how to patch the 10.10.3 Kernel to support more cores than 16?

 

Thanks